Car-truck.



s. M. VAUCLAIN.

GAR TRUCK.

APPLISATION PXLED MAY4, 1912 1,1 O2, 108, Emeuted June 3Q, 19H,

S. M. VAUCLAIN.

CAR TRUCK. APPLICATION NLLD MAY/1, 1912.

Patented June 30, 1914n 2 SHEETSSHEET 2.

extended flat portion z'.

ED STATES AParrain? OFFICE.

SAMUEL M. VAUCLAIN, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE BALDWIN LOCOMOTIVE WORKS, 0F PHILADELPHIA, PENNSYLVANIA, A CORPO- RATION OF PENNSYLVANIA.

CAR-TRUCK.

Specification of Letters Patent.

Patented J une 30, 1914.

To all whom it may concern.'

Ile it known that I, SAMUEL M. Vannaiis, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Car-Trucks, of which the following is a specication.

One object of my invention is to provide means for preventing the nosing of a car when said car is traveling either on a straight or on a crooked track.

A further object of the invention 1s to provide means for quickly bringing the truck to its normal position after the car has passed over a curve.

A' still further object of the invention is to provide a three point contact on each truck for a car body.

In the accompanying drawin z-Figure 1, is a plan view of a car truck illustrating my invention and showing the body bolster mounted above the truck; Fig. 2, is a side view of the truck; Fig. 3, is a transverse `sectional view of the truck on the line 3-3,

Fig. 2, showing the body bolster in outside view; and Fig. 4 is an enlarged view showiiw the wheel an the rack plate detached.

lefcrring to the drawings, A is the body bolster secured to the car body.

D is the tinck frame having a bolster B `secured thereto extending from one side frame B to the other, as illustrated in Fig. 1. 1

C-C are the axles having the ordinary wheels and mounted in boxes located in the sido frames li. lhe pivot b of the truck is at one side of the transverse line through (he center of the truck and the other two bearings X-X are on the opposite side of .said transverse line and on cach side 0f the longitudinal center line g/-q/ of the truck so that a three point support for the car body is provided.

Forming part of the truck bolster B or secured thereto is a segmental rack M, having teeth m and mounted in bearings a on the body bolster A are pivot pins a for the wheels I, which are recessed at z" to mesh with the toothed rack plate M. These wheels are on the line --w and form two of the three bearing points of the car bod iii the truck. The 'bearing surface of eac ihocl is beveled, as shown, from the pivot iont b of the truck. Each wheel has an This iiat portion is greater than the distance between the other notches on the wheel. I preferably so arrange the parts that the bearing is taken by the teeth; there being a clearance between .the flat surface i of the wheel and the flat surface of the segment M, but in some instances the two flat surfaces may be in contact, if desired.

In this construction, the flat portion z' of the wheels I rests directly above the segmental rack M and offers a resistance to any change in the parallelism of the axes of car and trucks; preventing nosing or swiveling of the trucks under the car body, diie to irregularity of track or other causes. Thus, a car,- when traveling rapidly over an uneven track, will ride with comparative smoothness.

The truck must lift the car body in order to allow it to turn2 but this lifting will only occur when a car is passin around a curve, at which time the car bo y will be lifted; the trucks freely swin ing under the car body without further e evation of said car body.

I claim:

1. The combination of a car bod a truck pivotall mounted under the car ody; `the pivot o the truck bein at one side of the center of the truck an forming one bearing; a toothed segment on the truck; two notched wheels mounted on the body of the car and bearing upon the segment; said wheels being located on the o posite side of a transverse line through tie truck to the center bearing and on opposite sides of the longitudinal center line.

2. The combination in a car body, of a truck pivotally mounted under the car body having a center bearin and two side bearings at each side of t e longitudinal center line of the truck and to one side of the transverse center line; said side bearings consistin of a segmental rack on the truck and whee s on the car body; the wheels and the rack having flat portions which are op- )osito to each other when the longitudinal ine of the truck is parallel with the Ion` gitudinal line of the car body.

8. The combination of a car body; a bolster secured thereto; a car truck aving a bolster extending transversely of the truck; the two holsters being pivotally connected on the longitudinal center line of the car body and to one side of the transverse line through the center of the truck; a toothed segment on the truck bolster; the body bolster havin? bearings; pins in the bearings radiating rom the ivot connection of the two holsters; a note ed wheel on each pin bearing upon the segment; said wheels having nn extended fiat surface resting nornmlly. above the segment when the center line of 'the truck is parallel'with the center line of the car body; the:?balance-of each wheel being concentric so that while the truck is prevented from nosing, it? is free to turn when the car is passing around u curve without further elevation of the car body.

In testimony whereof, I have signed my l5 name to this specification, in the presence of two subscribing witnesses.

SAMUEL M. VAUCLAIN.

Witnesses:

J'. H. KERST, C. E. RoniNsoN.

Copies of this ipatent'may be obtained for'nve nenti each, addressing the Commissioner of Patents,

l wnhlnztoml). 0. 

